CN107650677A - The control method and device of differential lock - Google Patents
The control method and device of differential lock Download PDFInfo
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- CN107650677A CN107650677A CN201710856263.6A CN201710856263A CN107650677A CN 107650677 A CN107650677 A CN 107650677A CN 201710856263 A CN201710856263 A CN 201710856263A CN 107650677 A CN107650677 A CN 107650677A
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- differential lock
- speed
- current
- steering angle
- differential
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
- B60K17/16—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of differential gearing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
- B60K17/16—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of differential gearing
- B60K17/20—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of differential gearing in which the differential movement is limited
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H48/00—Differential gearings
- F16H48/20—Arrangements for suppressing or influencing the differential action, e.g. locking devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/36—Inputs being a function of speed
- F16H59/44—Inputs being a function of speed dependent on machine speed of the machine, e.g. the vehicle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/50—Inputs being a function of the status of the machine, e.g. position of doors or safety belts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/101—Engine speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H48/00—Differential gearings
- F16H48/20—Arrangements for suppressing or influencing the differential action, e.g. locking devices
- F16H2048/204—Control of arrangements for suppressing differential actions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H48/00—Differential gearings
- F16H48/20—Arrangements for suppressing or influencing the differential action, e.g. locking devices
- F16H2048/204—Control of arrangements for suppressing differential actions
- F16H2048/205—Control of arrangements for suppressing differential actions using the steering as a control parameter
Abstract
The disclosure is directed to a kind of control method of differential lock and device, belong to technical field of automobile electronic control.Methods described includes：Controller detects the current steering angle of steering wheel, if the current steering angle is more than default steering angle, and differential lock is in lockup state, then controls the differential lock to unlock；Current speed discrepancy and current vehicle speed between two power transmission shafts of controller detection connection differential lock, if it is poor that the current speed discrepancy is more than preset rotation speed, the current vehicle speed is less than the first pre-set velocity, and the differential lock is in released state, then controls the differential lock locking.Using the disclosure, the method intelligent of differential mechanism unblock and locking is automatically controlled by controller, driver does not interfere with the normal driving of driver without frequently controlling differential lock button on cross-country road.
Description
Technical field
The disclosure is directed to technical field of automobile electronic control, especially with respect to the control method and dress of a kind of differential lock
Put.
Background technology
Differential mechanism is referred to connect two driving wheels and two driving wheels can be made to realize the machine rotated with different rotating speeds
Structure, for example, the differential mechanism for connecting left and right sidesing driving wheel, mainly including left half axle gear, right axle shaft gear, multiple planetary gears
And planet carrier etc..When automobile is being turned or exercised on uneven road surface, left driving wheel, right driving wheel is set to turn with different rotating speeds
It is dynamic.
But when automobile is exercised in cross-country road surface such as muddy road surface etc., differential mechanism but turns into the obstacle that automobile advances,
Specifically, during automobile is exercised on the road surfaces such as miriness, skidded when there is a driving wheel, another driving wheel is stuck
Situation when, due to differential mechanism allow driving wheel with different rotational speeds, so stuck driving wheel is constantly in static shape
State, the driving wheel of skidding are constantly in rotary state, so cause automobile not advance.In order that automobile can be in cross-country road
, it is necessary to install differential lock in differential mechanism, differential lock is a kind of for realizing left half axle gear and right axle shaft tooth for upper normal enforcement
Take turns rigidly connected mechanism.The manipulation of existing differential lock is after driver is judged actual condition, to pass through differential lock mostly
Mechanical button carries out locking or solution lock control to differential lock.
During the disclosure is realized, inventor has found problems with least be present：
The locking of differential lock needs artificial judgment and manipulation with unblock, delays the normal driving of driver, especially works as vapour
When being driven on cross-country road, driver needs frequently to carry out locking and unblock to differential lock car, influences the driving of driver.
The content of the invention
In order to overcome present in correlation technique when automobile is driving on cross-country road, driver is needed frequently to differential
Lock carries out locking and unblock, and the problem of influenceing the driving of driver, present disclose provides a kind of control method of differential lock and dress
Put.The technical scheme is as follows：
According to the first aspect of the embodiment of the present disclosure, there is provided a kind of control method of differential lock, methods described include：
Controller detects the current steering angle of steering wheel, if the current steering angle is more than default steering angle, and differential
Lock is in lockup state, then controls the differential lock to unlock；
Current speed discrepancy and current vehicle speed between two power transmission shafts of controller detection connection differential lock, if described work as
Preceding speed discrepancy is poor more than preset rotation speed, and the current vehicle speed is less than the first pre-set velocity, and the differential lock is in released state,
Then control the differential lock locking.
Optionally, the current steering angle of the controller detection steering wheel, if the current steering angle is more than default turn
To angle, and differential lock is in lockup state, then controls the differential lock to unlock, including：
Controller detects the current steering angle of steering wheel, if the current steering angle is persistently more than in preset time period
Default steering angle, and differential lock is in lockup state, then controls the differential lock to unlock.
Optionally, if the current speed discrepancy is more than, preset rotation speed is poor, and it is default that the current vehicle speed is less than first
Speed, and the differential lock is in released state, then controls the differential lock locking, including：
If the current speed discrepancy is more than in preset time period, preset rotation speed is poor, and the current vehicle speed is in preset time
Continuously less than the first pre-set velocity in section, and the differential lock is in released state, then controls the differential lock locking.
Optionally, methods described also includes：
Turn sensor in speed not fail, and in the case that differential lock is in lockup state, the controller detects currently
When speed is more than the second pre-set velocity, control fuel injector stops oil spout.
Optionally, methods described also includes：
Turn sensor failure in speed, and in the case that differential lock is in lockup state, the controller detects engine
Rotating speed when being more than preset rotation speed threshold value, control fuel injector stops oil spout.
According to the second aspect of the embodiment of the present disclosure, there is provided a kind of control device of differential lock, described device include unblock
Module and locking module, wherein：
The unlocked state is configured as, and detects the current steering angle of steering wheel, if the current steering angle is more than in advance
If steering angle, and differential lock is in lockup state, then controls the differential lock to unlock；
The locking module is configured as, current speed discrepancy between two power transmission shafts of detection connection differential lock and current
Speed, if the current speed discrepancy is more than, preset rotation speed is poor, and the current vehicle speed is less than the first pre-set velocity, and the differential
Lock is in released state, then controls the differential lock locking.
Optionally, the unlocked state is configured to：
The current steering angle of steering wheel is detected, if the current steering angle is persistently more than default turn in preset time period
To angle, and differential lock is in lockup state, then controls the differential lock to unlock.
Optionally, the locking module is configured to：
If the current speed discrepancy is more than in preset time period, preset rotation speed is poor, and the current vehicle speed is in preset time
Continuously less than the first pre-set velocity in section, and the differential lock is in released state, then controls the differential lock locking.
Optionally, described device also includes oil-break module, wherein, the oil-break module is configured as：
Turn sensor in speed not fail, and in the case that differential lock is in lockup state, detect that current vehicle speed is more than the
During two pre-set velocities, control fuel injector stops oil spout.
Optionally, the oil-break module is configured to：
Turn sensor failure in speed, and in the case that differential lock is in lockup state, detect that the rotating speed of engine is more than
During preset rotation speed threshold value, control fuel injector stops oil spout.
The technical scheme provided by this disclosed embodiment can include the following benefits：
In the embodiment of the present disclosure, the differential lock of automobile can be automatically controlled by controller according to actual conditions, to realize
It is unlocked and locking, specifically, when automobile is turned, the current steering angle of controller detection steering wheel is more than default turn to
Angle, and differential lock is in lockup state, then controller control differential lock unblock；Automobile is in cross-country road traveling, when driving
When driving wheel is trapped in the situation of miriness, it is pre- that controller detects that the current speed discrepancy between two power transmission shafts of connection differential lock is more than
If speed discrepancy, current vehicle speed is less than the first pre-set velocity, and differential lock is in released state, then controller control differential lock lock
Only.This method intelligent that differential mechanism is automatically controlled by controller, driver is without frequently controlling on cross-country road
Differential lock button, therefore, the normal driving of driver is not interfered with.
It should be appreciated that the general description and following detailed description of the above are only exemplary and explanatory, not
The disclosure can be limited.
Brief description of the drawings
Accompanying drawing herein is merged in specification and forms the part of this specification, shows the implementation for meeting the disclosure
Example, and be used to together with specification to explain the principle of the disclosure.In the accompanying drawings：
Fig. 1 is the control method flow chart according to a kind of differential lock for implementing to exemplify；
Fig. 2 a are the schematic diagrames changed over time according to a kind of speed discrepancy for implementing to exemplify；
Fig. 2 b are the schematic diagrames changed over time according to a kind of differential-lock control signal for implementing to exemplify；
Fig. 2 c are the schematic diagrames changed over time according to a kind of speed for implementing to exemplify；
Fig. 2 d are the signal schematic representations according to a kind of controller control differential lock for implementing to exemplify；
Fig. 2 e are the signal schematic representations according to a kind of controller control fuel injector for implementing to exemplify；
Fig. 3 a are the schematic diagrames changed over time according to a kind of speed discrepancy for implementing to exemplify；
Fig. 3 b are the schematic diagrames changed over time according to a kind of differential-lock control signal for implementing to exemplify；
Fig. 3 c are the schematic diagrames changed over time according to a kind of speed for implementing to exemplify；
Fig. 3 d are the signal schematic representations according to a kind of controller control differential lock for implementing to exemplify；
Fig. 3 e are the signal schematic representations according to a kind of controller control fuel injector for implementing to exemplify；
Fig. 4 a are the schematic diagrames changed over time according to a kind of speed discrepancy for implementing to exemplify；
Fig. 4 b are the schematic diagrames changed over time according to a kind of differential-lock control signal for implementing to exemplify；
Fig. 4 c are the schematic diagrames changed over time according to a kind of speed for implementing to exemplify；
Fig. 4 d are the signal schematic representations according to a kind of controller control differential lock for implementing to exemplify；
Fig. 4 e are the signal schematic representations according to a kind of controller control fuel injector for implementing to exemplify；
Fig. 5 is the structural representation according to a kind of differential lock device for implementing to exemplify；
Fig. 6 is the structural representation according to a kind of differential lock device for implementing to exemplify.
Pass through above-mentioned accompanying drawing, it has been shown that the clear and definite embodiment of the disclosure, will hereinafter be described in more detail.These accompanying drawings
It is not intended to limit the scope of disclosure design by any mode with word description, but is by reference to specific embodiment
Those skilled in the art illustrate the concept of the disclosure.
Embodiment
Here exemplary embodiment will be illustrated in detail, its example is illustrated in the accompanying drawings.Following description is related to
During accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represent same or analogous key element.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistent with the disclosure.On the contrary, they be only with it is such as appended
The example of the consistent apparatus and method of some aspects be described in detail in claims, the disclosure.
Embodiment one
The exemplary embodiment of the disclosure one provides a kind of control method of differential lock, wherein, differential lock is applied to automobile
Technical field, it is a kind of device for locking differential, and differential mechanism refers to connect two driving wheels and can make two drives
Driving wheel realizes the mechanism rotated with different rotating speeds, for example, the differential mechanism for connecting left and right sidesing driving wheel, main to include left half
Shaft gear, right axle shaft gear, multiple planetary gears and planet carrier etc..When automobile is being turned or exercised on uneven road surface,
Left driving wheel, right driving wheel is set to be rotated with different rotating speeds, to reduce the abrasion of wheel.
But when automobile is exercised in cross-country road surface such as muddy road surface etc., differential mechanism but turns into the obstacle that automobile advances,
Specifically, during automobile is exercised on the road surfaces such as miriness, skidded when there is a driving wheel, another driving wheel is stuck
Situation when, due to differential mechanism allow driving wheel with different rotational speeds, so stuck driving wheel is constantly in static shape
State, the driving wheel of skidding are constantly in rotary state, so cause automobile not advance.In order that automobile can be in cross-country road
, it is necessary to install differential lock in differential mechanism, differential lock is a kind of for realizing left half axle gear and right axle shaft tooth for upper normal enforcement
Take turns rigidly connected mechanism.
Differential lock in the present embodiment can be applied in the automobile of two drive systems, such as is applied in front-engine rear-drive system
In, front-engine rear-drive that is to say, i.e. engine behind front wheel, rear wheel drive, is a kind of more traditional type of drive, can also apply
In four-wheel drive system.When applying in two drive systems, differential mechanism and differential lock are respectively positioned between left driving wheel and right driving wheel, tool
Body, the left end of differential mechanism is fixed on left driving wheel by power transmission shaft, and the right-hand member of differential mechanism is fixed on right drive by power transmission shaft
On driving wheel, differential lock is then arranged in differential mechanism.When applying in four-wheel drive system, the four-wheel drive system include three differential mechanisms and
Three differential locks, wherein, a center differential and central differential lock are installed between two front driving wheels, for control front-wheel it
Between differential, a center differential and central differential lock are installed, for controlling the difference between trailing wheel between two rear drive sprockets
Speed, connect and a differential mechanism and differential lock are installed between front driving wheel and the front propeller shaft and inter-axle shaft of rear drive sprocket, be used for
Control the differential of front and back wheel.The control method of differential mechanism and differential lock is basically identical in two drive systems and four-wheel drive system, for convenience
Example is carried out by taking front-engine rear-drive as an example in narration the present embodiment.
As shown in figure 1, the control method of the differential lock can be in accordance with the following steps：
Step 101, the current steering angle of controller detection steering wheel, if the current steering angle is more than default steering angle,
And differential lock is in lockup state, then differential lock unblock is controlled.
In force, the engine electronic control unit for controlling vehicle is installed in automobile, abbreviation controller, is also referred to as
ECU (Electronic Control Unit, electronic control unit), is automobile specified microcomputerized controller, also known as " driving electricity
Brain ", " vehicle-mounted computer " etc..The current steering angle of steering wheel is detected in real time by rotation direction sensor, and rotation direction sensor will detect
As a result controller is sent to, for example, when rotation direction sensor detects that the current steering angle of steering wheel is more than default steering angle,
High level signal then is sent to controller, controller carries out respective handling after receiving the high level signal.The speed of automobile
Detected in real time by vehicle speed sensor, testing result is sent to controller by vehicle speed sensor, for example, when vehicle speed sensor is examined
When measuring current vehicle speed and being more than pre-set velocity, high level signal is sent to controller, controller receive the high level signal it
Afterwards, respective handling is carried out.
In actual applications, when automobile is in steering state, rotation direction sensor detects that the current steering angle of automobile is big
High level signal is sent in predetermined angle, and to controller.Controller receive rotation direction sensor transmission high level signal it
Afterwards, the current state of differential lock is judged, if differential lock is currently at lockup state, control differential lock unblock so that left drive
Rotating speed between driving wheel and right driving wheel can differ, and in steering procedure, the rotating speed of interior side drive wheel is less than outside driven wheel
Rotating speed, so as to avoid the tire wear of inboard wheel.
Step 102, the current speed discrepancy and current vehicle speed between two power transmission shafts of controller detection connection differential lock, such as
Current speed discrepancy described in fruit is poor more than preset rotation speed, and the current vehicle speed is less than the first pre-set velocity, and the differential lock is in
Released state, then control the differential lock locking.
Wherein, the first pre-set velocity be speed than relatively low speed, or even the speed close to parking.
In force, the left end of differential mechanism is fixed on left driving wheel by power transmission shaft, and the right-hand member of differential mechanism passes through transmission
Axle is fixed in right driving wheel, and differential lock is fixed in differential mechanism.Left driving wheel and the rotating speed of right driving wheel can pass through rotating speed
Sensor detects, and speed probe is sent to controller by structure is detected, so as to which controller can obtain left driving wheel and right drive
Speed discrepancy between driving wheel.
In actual applications, when a collapsible wheel of automobile is in miriness, such as left driving wheel is trapped in miriness, this
When, if differential lock is in released state, left driving wheel mad can rotate, and right driving wheel rotating speed is very low, or even static, lead
Automobile is caused not travel, then current vehicle speed is close to zero.In above-mentioned scene, controller detects two drives of connected with differential
Speed discrepancy between driving wheel is poor more than preset rotation speed, detects that current vehicle speed is less than the first pre-set velocity by vehicle speed sensor,
And judge that differential lock is currently at released state, then send high level electric signal to differential lock, differential lock receives the height
After level electrical signal, locking differential so that two driving wheels of differential mechanism both sides become to be rigidly connected, and such engine is defeated
The moment of torsion gone out averagely can pass to two driving wheels, so that the driving wheel hardly rotated is rotated, what madness rotated
The rotating speed of driving wheel lowers, and then automobile is come out from miriness.
Based on described above, the speed discrepancy between two driving wheels of the controller by detecting connected with differential, and work as
Preceding speed, to control the locking of differential lock and unblock, with controlled manually by driver in the prior art the locking of differential lock with
Unblock is compared, and controller control differential lock intelligent, high sensitivity, driver is without frequently controlling differential on cross-country road
Button is locked, allows driver to concentrate one's energy to drive, relatively safety.This method that differential lock is controlled using controller, only
On the basis of existing differential lock, add for realizing differential lock unblock and the coding of locking, do not relate in the controller
And the change or addition of hardware, it is more cost-effective.
Optionally, in actual applications, due to a variety of causes such as wire harness or the interference of external magnetic field causes
Jitter, as controller moment receives high level signal, locking and the unblock of differential lock may be influenceed, in order that control
Device processed can be with the unblock of more stable control differential lock and locking, and accordingly, controller detects the current steering angle of steering wheel,
If the current steering angle is persistently more than default steering angle in preset time period, and differential lock is in lockup state, then controls
Make the differential lock unblock；If it is poor that the current speed discrepancy is persistently more than preset rotation speed in preset time period, described current
Speed is continuously less than the first pre-set velocity in preset time period, and the differential lock is in released state, then controls the difference
Speed lock locking.
Wherein, duration is such as can be 50 milliseconds, if for example, the current speed discrepancy is equal in 50 milliseconds
Poor more than preset rotation speed, the current vehicle speed is respectively less than the first pre-set velocity in 50 milliseconds, and the differential lock is in unblock
State, then control the differential lock locking.But if the current speed discrepancy is more than default turn intermittently in 50 milliseconds
Speed difference, then controller the desultory signal automatic shield can be fallen.So, controller, which can be responded more accurately, turns
The signal of speed difference, speed etc..
Optionally, in the state of differential lock is in locking, if speed is larger, certain abrasion can be produced to wheel,
The occurrence of in order to avoid this, controller can also be by controlling fuel injector to stop oil spout come restricted speed, accordingly, in car
In the case that speed turns sensor and do not failed, and differential lock is in lockup state, when the controller detects that current vehicle speed is more than the
During two pre-set velocities, control fuel injector stops oil spout.
Wherein, the second pre-set velocity is the bigger situation of speed, if speed is more than 24 kilometer per hours.
In force, in the case where speed turns sensor failure, controller can be controlled according to the current rotating speed of engine
Fuel injector processed, accordingly, turn sensor failure in speed, and in the case that differential lock be in lockup state, when controller inspection
When measuring the current rotating speed of engine and being more than preset rotation speed threshold value, control fuel injector stops oil spout.So, when fuel injector stops spraying
When oily, because cannot get enough energy and power decrease, speed reduces engine, when speed is less than the second pre-set velocity, control
Device processed controls fuel injector oil spout again.
Based on described above, controller can control difference by the speed discrepancy between two driving wheels and current vehicle speed
The locking and unblock, its control process of speed lock can be verified that verification process can be as follows by emulation technology：
As shown in Figure 2,3, 4, wherein, a figures represent the speed discrepancy between two driving wheels and the change of time in each figure
Change curve；B figures represent the switch and the graph of a relation of time of differential lock, wherein, high level (that is to say 1 in figure) represents differential lock
Open (that is to say differential lock locking differential), low level (that is to say 0 in figure) represents that differential lock is closed and (that is to say differential lock
Unblock)；C figures represent speed and the graph of a relation of time；D figures represent the electric signal of controller control differential lock, wherein, high level table
Show locking signal, low level represents unlocking signal；E figures represent oil-break signal, wherein, high level represents oil-break signal, low level
Represent fuel supply signal.
Situation one, under normal operation, it is poor to that is to say that speed discrepancy is not above preset rotation speed, speed is in first
Between pre-set velocity and the second pre-set velocity, and without twinkling signal in the case of, simulation result is as shown in Figure 2.As mould mimic
When the switch of differential lock is gone into open mode, differential lock is in lockup state, the height electricity as shown in the 1st second in 2b figures occur
Ordinary mail number, after controller detects the high level signal, current speed discrepancy and current vehicle speed is detected first, in Fig. 2 a, 2c
Curve understands that current speed discrepancy is less than 3000 revolutions per minute at the 1st second, and current vehicle speed is every less than 20 kms, is unsatisfactory for compulsive unlocking
Condition, then controller can based on mimic selection control differential lock locking, therefore occur as in Fig. 2 d figures at the 1st second
High level signal, controller control differential lock locking.When mimic closes differential lock, occur in such as Fig. 2 b at about 1.8 seconds
Low level signal, after controller detects the low level signal, detect current speed discrepancy and current vehicle speed first, such as scheme
Curve is understood in 2a, 2c, and current speed discrepancy is less than 3500 revolutions per minute at the time point, when current vehicle speed is about that 15 kms are per,
Be unsatisfactory for the condition of forced locking, then controller can the selection based on mimic, control differential lock unblock, therefore occur as scheme
Low level signal at the time point in 2d figures, controller control differential lock unblock.Equally, other pulses letter in analysis chart 2b
Number.In addition, understanding the simulation process from Fig. 2 c figures, speed is less than 20 kilometer per hours, and smaller, being not reaching to stops fuel injector
The only speed of oil spout, therefore, the oil-break signal of controller control fuel injector are constantly in low level as shown in Figure 2 e.
Situation two, the rotating speed for speed or engine occur in differential lock conversion exceed preset rotation speed threshold value, and without wink
Between in the case of signal, simulation process can be as shown in Figure 3.When the switch of differential lock is switched to opening by mould mimic,
There is high level signal within the 1st second in Fig. 3 b, after controller detects the high level signal, first determine whether current speed discrepancy and work as
Preceding speed, as curve understands that current speed discrepancy was less than 3500 revolutions per minute at the 1st second, and current vehicle speed is less than 20 kms in Fig. 3 a, 3c
Per when, be unsatisfactory for the condition of compulsive unlocking, then controller can the selection based on mimic, control differential lock locking, therefore, go out
Now such as the high level signal in Fig. 2 d figures at the timing node, then controller control differential lock locking.When mimic is by differential
When lock is switched to closing, low level signal when occurring the 3rd second in Fig. 3 b, when controller detects the low level signal, first
Current speed discrepancy and current vehicle speed are detected, such as Fig. 3 a, shown in 3c, current speed discrepancy is about 6800 turns every at the timing node
Point, current vehicle speed is about 39 kilometer per hours, such case, meets that speed discrepancy is larger, and the less situation of speed, therefore, i.e.,
Make mimic that differential lock is switched into closing by opening, but controller does not allow to switch, and therefore, occurs as 3 to 6 seconds in Fig. 3 b
In high level signal, and the high level signal in 3d in 3 to 6 seconds that is to say that differential lock is always in the period of 3 to 6 seconds
In lockup state.
Then at the 6th second, when differential lock is switched to opening by mimic, due to differential lock one in the period of 3 to 6 seconds
Straight be in is opened, and therefore, the signal of controller control differential lock is in high level signal in 3d figures.Mimic at the 8th second
By the switch spanner of differential lock to when closing, now current speed discrepancy and current vehicle speed are unsatisfactory for the condition of forced locking, therefore, control
Device processed can based on mimic selection control differential lock unblock, there is the low level signal after the 8th second in Fig. 3 d.
In addition, in the state of 1 to 8 second control controls differential lock locking, speed is big during 1.35 seconds to 5.02 seconds
In the second pre-set velocity, for example, the second pre-set velocity can be 24 kilometer per hours, speed is higher, then controller is to fuel injector
The signal for stopping oil spout being sent, is occurred such as the high level signal in Fig. 3 e during 1.35 seconds to 5.02 seconds, then fuel injector stopping
Oil spout, then speed be gradually reduced.During 5.02 seconds to 7.64 seconds, controller detects that speed is less than 23.5 kilometer per hours,
Low level then is sent to fuel injector, controls the outside oil spout of fuel injector.
Situation three, speed discrepancy is poor without departing from preset rotation speed, speed be in the first pre-set velocity and the second pre-set velocity it
Between, but in the case that differential-lock control has twinkling signal, can be as shown in Figure 4.Although occur opening for differential lock in Fig. 4 b
The signal of frequent switching is closed, but when controller needs to be continuously detected high level signal, for example, described above, controller is only
When being continuously detected switching signal, corresponding signal could be responded, therefore, although occurring frequent switching signal in Fig. 4 b,
But controller does not respond to the signal, the signal of controller control differential lock is constantly in low level as shown in figure 4d.Separately
Outside, in the simulation process, speed is respectively less than 24 kilometer per hours, and therefore, controller controls signal such as Fig. 4 e institutes of fuel injector
Show, all the time in low level.
In the embodiment of the present disclosure, the differential lock of automobile can be automatically controlled by controller according to actual conditions, to realize
It is unlocked and locking, specifically, when automobile is turned, the current steering angle of controller detection steering wheel is more than default turn to
Angle, and differential lock is in lockup state, then controller control differential lock unblock；Automobile is in cross-country road traveling, when driving
When driving wheel is trapped in the situation of miriness, it is pre- that controller detects that the current speed discrepancy between two power transmission shafts of connection differential lock is more than
If speed discrepancy, current vehicle speed is less than the first pre-set velocity, and differential lock is in released state, then controller control differential lock lock
Only.This method intelligent that differential mechanism is automatically controlled by controller, driver is without frequently controlling on cross-country road
Differential lock button, therefore, the normal driving of driver is not interfered with.
Embodiment two
Disclosure further example embodiment provides a kind of control device of differential lock, and the device can be embodiment one
Described controller, as shown in figure 5, the device includes unlocked state 510 and locking module 520, wherein：
Unlocked state 510 is configured as, and detects the current steering angle of steering wheel, is preset if the current steering angle is more than
Steering angle, and differential lock is in lockup state, then controls the differential lock to unlock；
Locking module 520 is configured as, current speed discrepancy between two power transmission shafts of detection connection differential lock and current
Speed, if the current speed discrepancy is more than, preset rotation speed is poor, and the current vehicle speed is less than the first pre-set velocity, and the differential
Lock is in released state, then controls the differential lock locking.
Optionally, unlocked state 510 is configured to：
The current steering angle of steering wheel is detected, if the current steering angle is persistently more than default turn in preset time period
To angle, and differential lock is in lockup state, then controls the differential lock to unlock.
Optionally, locking module 520 is configured to：
If the current speed discrepancy is more than in preset time period, preset rotation speed is poor, and the current vehicle speed is in preset time
Continuously less than the first pre-set velocity in section, and the differential lock is in released state, then controls the differential lock locking.
Optionally, as shown in fig. 6, the device also includes oil-break module 530, wherein, oil-break module 530 is configured as：
Turn sensor in speed not fail, and in the case that differential lock is in lockup state, detect that current vehicle speed is more than the
During two pre-set velocities, control fuel injector stops oil spout.
Optionally, oil-break module 530 is configured to：
Turn sensor failure in speed, and in the case that differential lock is in lockup state, detect that the rotating speed of engine is more than
During preset rotation speed threshold value, control fuel injector stops oil spout.
On the device in above-described embodiment, wherein modules perform the concrete mode of operation in relevant this method
Embodiment in be described in detail, explanation will be not set forth in detail herein.
In the embodiment of the present disclosure, the differential lock of automobile can be automatically controlled by controller according to actual conditions, to realize
It is unlocked and locking, specifically, when automobile is turned, the current steering angle of controller detection steering wheel is more than default turn to
Angle, and differential lock is in lockup state, then controller control differential lock unblock；Automobile is in cross-country road traveling, when driving
When driving wheel is trapped in the situation of miriness, it is pre- that controller detects that the current speed discrepancy between two power transmission shafts of connection differential lock is more than
If speed discrepancy, current vehicle speed is less than the first pre-set velocity, and differential lock is in released state, then controller control differential lock lock
Only.This method intelligent that differential mechanism is automatically controlled by controller, driver is without frequently controlling on cross-country road
Differential lock button, therefore, the normal driving of driver is not interfered with.
It should be noted that：The control device for the differential lock that above-described embodiment provides is when controlling differential lock, only with above-mentioned
The division progress of each functional module, can be as needed and by above-mentioned function distribution by different for example, in practical application
Functional module is completed, i.e., the internal structure of device is divided into different functional modules, with complete it is described above whole or
Partial function.In addition, the control device of differential lock and the control method embodiment of differential lock that above-described embodiment provides belong to same
One design, its specific implementation process refer to embodiment of the method, repeated no more here.
Those skilled in the art will readily occur to the disclosure its after considering specification and putting into practice disclosure disclosed herein
Its embodiment.The application is intended to any modification, purposes or the adaptations of the disclosure, these modifications, purposes or
Person's adaptations follow the general principle of the disclosure and including the undocumented common knowledges in the art of the disclosure
Or conventional techniques.Description and embodiments are considered only as exemplary, and the true scope of the disclosure and spirit are by above
Claim is pointed out.
It should be appreciated that the precision architecture that the disclosure is not limited to be described above and is shown in the drawings, and
And various modifications and changes can be being carried out without departing from the scope.The scope of the present disclosure is only limited by appended claim.
Claims (10)
1. a kind of control method of differential lock, it is characterised in that methods described includes：
Controller detects the current steering angle of steering wheel, if the current steering angle is more than default steering angle, and at differential lock
In lockup state, then the differential lock is controlled to unlock；
Current speed discrepancy and current vehicle speed between two power transmission shafts of controller detection connection differential lock, if described work as forward
Speed difference is poor more than preset rotation speed, and the current vehicle speed is less than the first pre-set velocity, and the differential lock is in released state, then controls
Make the differential lock locking.
2. according to the method for claim 1, it is characterised in that the current steering angle of the controller detection steering wheel, such as
Current steering angle described in fruit is more than default steering angle, and differential lock is in lockup state, then controls the differential lock to unlock, bag
Include：
Controller detects the current steering angle of steering wheel, if the current steering angle is persistently more than default in preset time period
Steering angle, and differential lock is in lockup state, then controls the differential lock to unlock.
3. according to the method for claim 1, it is characterised in that if the current speed discrepancy is more than preset rotation speed
Difference, the current vehicle speed is less than the first pre-set velocity, and the differential lock is in released state, then controls the differential lock to lock
Only, including：
If the current speed discrepancy is more than in preset time period, preset rotation speed is poor, and the current vehicle speed is in preset time period
Continuously less than the first pre-set velocity, and the differential lock is in released state, then controls the differential lock locking.
4. according to the method for claim 1, it is characterised in that methods described also includes：
Turn sensor in speed not fail, and in the case that differential lock is in lockup state, the controller detects current vehicle speed
During more than the second pre-set velocity, control fuel injector stops oil spout.
5. according to the method for claim 4, it is characterised in that methods described also includes：
Turn sensor failure in speed, and in the case that differential lock be in lockup state, the controller detects turn of engine
When speed is more than preset rotation speed threshold value, control fuel injector stops oil spout.
A kind of 6. control device of differential lock, it is characterised in that described device includes unlocked state and locking module, wherein：
The unlocked state is configured as, and detects the current steering angle of steering wheel, if the current steering angle is more than default turn
To angle, and differential lock is in lockup state, then controls the differential lock to unlock；
The locking module is configured as, current speed discrepancy and current vehicle between two power transmission shafts of detection connection differential lock
Speed, if the current speed discrepancy is more than, preset rotation speed is poor, and the current vehicle speed is less than the first pre-set velocity, and the differential lock
In released state, then the differential lock locking is controlled.
7. device according to claim 6, it is characterised in that the unlocked state is configured to：
The current steering angle of steering wheel is detected, if the current steering angle is persistently more than default turn in preset time period
Angle, and differential lock is in lockup state, then controls the differential lock to unlock.
8. device according to claim 6, it is characterised in that the locking module is configured to：
If the current speed discrepancy is more than in preset time period, preset rotation speed is poor, and the current vehicle speed is in preset time period
Continuously less than the first pre-set velocity, and the differential lock is in released state, then controls the differential lock locking.
9. device according to claim 6, it is characterised in that described device also includes oil-break module, wherein, the oil-break
Module is configured as：
Turn sensor in speed not fail, and in the case that differential lock is in lockup state, it is pre- to detect that current vehicle speed is more than second
If during speed, control fuel injector stops oil spout.
10. device according to claim 9, it is characterised in that the oil-break module is configured to：
Turn sensor failure in speed, and in the case that differential lock be in lockup state, detect that the rotating speed of engine is more than and preset
During rotary speed threshold value, control fuel injector stops oil spout.
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| CN201710856263.6A CN107650677B (en) | 2017-09-20 | 2017-09-20 | Control method and device of differential lock |
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| CN201710856263.6A CN107650677B (en) | 2017-09-20 | 2017-09-20 | Control method and device of differential lock |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110081143A (en) * | 2019-04-03 | 2019-08-02 | 山东省农业机械科学研究院 | A kind of limited-slip differential, control system and control method |
| CN110271414A (en) * | 2019-05-29 | 2019-09-24 | 精诚工科汽车系统有限公司 | Differential lock control method and device |
| CN111853226A (en) * | 2020-07-02 | 2020-10-30 | 东风柳州汽车有限公司 | Semi-intelligent differential lock closed-loop control system and method based on differential lock controller |
| CN112963517A (en) * | 2021-02-01 | 2021-06-15 | 北京汽车集团越野车有限公司 | Differential lock control method and device, off-road vehicle and readable storage medium |
| CN113818507A (en) * | 2021-08-20 | 2021-12-21 | 徐州徐工筑路机械有限公司 | Automatic locking control system and method for differential mechanism of land leveler |
| CN114198478A (en) * | 2021-12-14 | 2022-03-18 | 三一专用汽车有限责任公司 | Differential lock control method, controller thereof and engineering vehicle |
| CN114263720A (en) * | 2021-05-21 | 2022-04-01 | 长城汽车股份有限公司 | Differential lock control system and method and vehicle |
| CN114763830A (en) * | 2021-06-17 | 2022-07-19 | 长城汽车股份有限公司 | Method and system for controlling wading mode differential lock and vehicle |
| WO2023000897A1 (en) * | 2021-07-21 | 2023-01-26 | 长城汽车股份有限公司 | Vehicle control method and apparatus in four-wheel drive mode, and vehicle |
| US20230021908A1 (en) * | 2021-07-15 | 2023-01-26 | Rivian Ip Holdings, Llc | Systems and methods for controlling speed differential of wheels of a vehicle |
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| US20230021908A1 (en) * | 2021-07-15 | 2023-01-26 | Rivian Ip Holdings, Llc | Systems and methods for controlling speed differential of wheels of a vehicle |
| WO2023000897A1 (en) * | 2021-07-21 | 2023-01-26 | 长城汽车股份有限公司 | Vehicle control method and apparatus in four-wheel drive mode, and vehicle |
| CN113818507A (en) * | 2021-08-20 | 2021-12-21 | 徐州徐工筑路机械有限公司 | Automatic locking control system and method for differential mechanism of land leveler |
| CN114198478A (en) * | 2021-12-14 | 2022-03-18 | 三一专用汽车有限责任公司 | Differential lock control method, controller thereof and engineering vehicle |
| CN114198478B (en) * | 2021-12-14 | 2023-09-22 | 三一专用汽车有限责任公司 | Differential lock control method, controller thereof and engineering vehicle |
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